The boundary between physics and mathematics is not as clear-cut as one might think.
物理学和数学之间的界限并不像人们想象的那么清晰。
I don’t focus on the past, I focus on the present.
如果你开心得太久，就会变得平庸。
所以君子严于律己、宽以待人，而平庸的人却宽以待己、严于律人。